CN115123510B - Ship electric propulsion system and electric propulsion method - Google Patents
Ship electric propulsion system and electric propulsion method Download PDFInfo
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- CN115123510B CN115123510B CN202210926228.8A CN202210926228A CN115123510B CN 115123510 B CN115123510 B CN 115123510B CN 202210926228 A CN202210926228 A CN 202210926228A CN 115123510 B CN115123510 B CN 115123510B
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- electric propulsion
- ship
- rotate
- stator
- propulsion device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H21/00—Use of propulsion power plant or units on vessels
- B63H21/12—Use of propulsion power plant or units on vessels the vessels being motor-driven
- B63H21/17—Use of propulsion power plant or units on vessels the vessels being motor-driven by electric motor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H23/00—Transmitting power from propulsion power plant to propulsive elements
- B63H23/02—Transmitting power from propulsion power plant to propulsive elements with mechanical gearing
- B63H23/10—Transmitting power from propulsion power plant to propulsive elements with mechanical gearing for transmitting drive from more than one propulsion power unit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
- H02K7/1807—Rotary generators
- H02K7/1861—Rotary generators driven by animals or vehicles
Abstract
The application provides a ship electric propulsion system and an electric propulsion method. The ship electric propulsion system comprises at least two electric propulsion devices; each electric propulsion device includes a base, a stator, and a rotor. The stator is installed on the base, and the stator includes the winding coil of circumference evenly distributed. The rotor comprises a middle shaft and a plurality of permanent magnets uniformly distributed around the circumference of the middle shaft, the middle shaft is fixedly connected with the permanent magnets and synchronously rotates, and the rotor is arranged in the stator. The rotation axes of the intermediate shafts of the electric propulsion devices are coincident and are rigidly connected end to end in sequence. The intermediate shaft of the electric propulsion device located on the side is connected to the propeller shaft train. The redundancy and the reliability of the ship electric propulsion system are effectively improved, a guarantee is provided for safe navigation of the ship, and meanwhile the flexibility of the ship is improved. Further, the power of the ship can be recovered when the ship is decelerated through the electric propulsion device, so that the ship is energy-saving and environment-friendly.
Description
Technical Field
The application relates to the field of ship power, in particular to a ship electric propulsion system and an electric propulsion method.
Background
At present, a ship adopts a propeller propulsion mode generally, and propeller propulsion comprises two modes. Firstly, mechanical propeller propulsion is carried out, wherein the propulsion mode mainly comprises the main engine, a middle shaft and a propeller, the internal energy of the fuel carried by the ship is transmitted to shafting equipment from the main engine, and finally the internal energy is changed into mechanical energy of the propeller so as to drive the ship to run. And secondly, the electric propeller is used for propelling, the power of the propelling mode is mainly transmitted through a main generator, a motor and the propeller, internal energy of fuel carried by the ship is converted into electric energy through an internal combustion engine and the generator, and the electric energy is converted into mechanical energy through the motor to drive the propeller to rotate, so that the ship is finally driven to travel.
In the prior art, the above methods have respective drawbacks. Firstly, mechanical propulsion mode generally carries out the transmission through transmission shaft and gear train, generally speaking, transmission shaft system length will be more than two fifths of total ship length, often can cause that the cabin position is restricted, the shafting centering is complicated, the cabin space is extravagant, have big noise scheduling problem to marine main engine equipment is big, constitutes complicacy, and the start-up time is slow. Secondly, the electric propeller propulsion mode generally adopts a plurality of main generators to generate electricity, and electric energy is distributed to each set of motors on the shaft system through an electric power distribution system, so that the requirements on the reliability and redundancy of the electric propulsion system and equipment are strict, particularly the requirements on the motors are strict, when the motors fail, the ship loses power and cannot run, and great challenges are brought to navigation safety.
Disclosure of Invention
An object of the embodiment of the application is to provide a ship electric propulsion system, which can effectively improve redundancy and reliability of the ship electric propulsion system, provide guarantee for safe sailing of a ship, and improve maneuvering flexibility of the ship. Further, the power of the ship can be recovered when the ship is decelerated through the electric propulsion device, so that the ship is energy-saving and environment-friendly.
A second object of the embodiments of the present application is also to provide a ship electric propulsion method using the above-described ship electric propulsion system.
In a first aspect, there is provided a marine electric propulsion system comprising at least two electric propulsion devices; each electric propulsion device includes a base, a stator, and a rotor. The base is fixedly connected with the ship body; the stator is arranged on the base and comprises winding coils with uniformly distributed circumferences; the rotor comprises a middle shaft and a plurality of permanent magnets uniformly distributed around the circumference of the middle shaft, the middle shaft is fixedly connected with the permanent magnets and synchronously rotates, and the rotor is arranged in the stator. The rotation axes of the intermediate shafts of the electric propulsion devices are overlapped and are rigidly connected end to end in sequence, so that a plurality of intermediate shafts are connected in series; the middle shaft of the electric propulsion device at the side is connected with the propeller shaft system, the rotation of the middle shaft drives the propeller shaft system to rotate, and the rotation of the propeller shaft system can also drive the middle shaft to rotate. When the winding coil of any electric propulsion device is electrified, a magnetic field is generated to generate repulsive force and attractive force on the permanent magnet so as to drive the intermediate shaft to rotate. When the winding coil of each electric propulsion device is not electrified, if the intermediate shaft rotates, the permanent magnet is driven to rotate, so that the winding coil cuts the magnetic induction line to generate current.
In one embodiment, all of the electric propulsion devices are identical in construction; the winding coils of the stators of all the electric propulsion devices are completely overlapped along the axial direction of the intermediate shaft; after the intermediate shafts of the rotors of all the electric propulsion devices are connected in sequence, the permanent magnets on all the intermediate shafts are completely overlapped along the axial direction of the intermediate shafts.
In one embodiment, the marine electric propulsion system further comprises a bearing housing; a bearing seat is respectively arranged on the ship bodies at two sides of each electric propulsion device; the two ends of the intermediate shaft of each electric propulsion device extend out of the stator for a preset length, and the two ends of the intermediate shaft of each electric propulsion device are respectively matched with one bearing seat; the two bearing blocks support an intermediate shaft such that the axis of the intermediate shaft coincides with the axis of the stator.
In one embodiment, adjacent countershafts are connected by a flange structure.
In one embodiment, the marine electric propulsion system further comprises an electrical storage device electrically connected to the electric propulsion device for storing the current generated by cutting the magnetic induction lines of the permanent magnets with the wound coil.
In one embodiment, the number of permanent magnets is the same as and even as the number of wound coils.
In one embodiment, the wound coils of all the electric propulsion devices are not energized when the vessel is decelerating; when the ship is accelerating or sailing at a constant speed, the winding coil of at least one electric propulsion device is electrified.
According to a second aspect of the present application, there is also provided a ship electric propulsion method using the ship electric propulsion system in the above-described aspect, the ship electric propulsion method including:
acquiring the navigation speed state of the ship;
if the sailing speed state of the ship is a deceleration state, the electrifying of the winding coils of the stators of all the electric propulsion devices is cut off, so that the propeller shafts drive a plurality of intermediate shafts connected in series to rotate, and further the rotors are driven to rotate, and the winding coils of all the electric propulsion devices cut the magnetic induction lines of the permanent magnets so as to generate current for the ship to store or use;
if the sailing speed state of the ship is in an accelerating or uniform speed state, the winding coil of the stator of at least one electric propulsion device is electrified, and the winding coil is electrified to generate a magnetic field to generate repulsive force and attractive force for the permanent magnet so as to drive all the intermediate shafts connected in series to rotate and further drive the propeller shaft system to rotate.
In one embodiment, when the sailing speed state of the ship is an accelerating or uniform speed state, a speed threshold is set, and the ship electric propulsion method further comprises:
if the sailing speed state of the ship is in an accelerating or uniform speed state, and the sailing speed of the ship is lower than a speed threshold value, electrifying a winding coil of a stator of at least one electric propulsion device, cutting off the electrifying of the winding coil of the stator of at least one electric propulsion device, wherein the electrified electric propulsion device is used for driving a serially connected intermediate shaft to rotate so as to drive a propeller shaft system to rotate, and the electrified cut-off electric propulsion device winds a magnetic induction line of a coil cutting permanent magnet so as to generate current for the ship to store or use;
if the sailing speed state of the ship is in an accelerating or uniform speed state and the sailing speed of the ship is greater than or equal to a speed threshold value, energizing winding coils of stators of all electric propulsion devices, and energizing the winding coils to generate a magnetic field to generate repulsive force and attractive force on the permanent magnets so as to drive all intermediate shafts connected in series to rotate and further drive a propeller shaft system to rotate.
Compared with the prior art, the beneficial effects of this application are:
according to the ship electric propulsion system, the power capacity of the ship is dispersed by utilizing the electric propulsion devices capable of mutually converting the electric energy and the mechanical energy, so that the normal running of the ship is prevented from being influenced by the failure of the single electric propulsion device, the risk of losing power when the ship sails is effectively reduced, the redundancy and the reliability of the ship electric propulsion system are improved, and the guarantee is provided for the safe sailing of the ship. Meanwhile, a plurality of even all electric propulsion devices can be started during acceleration or high-load navigation to provide larger power performance, and a small number of electric propulsion devices can be started during low-speed or low-load navigation to provide power performance matched with the required power performance, so that the maneuvering flexibility of the ship is improved. Further, the power of the ship can be recovered when the ship is decelerated through the electric propulsion device, the kinetic energy of the ship is converted into electric energy, the risk resistance of the ship propulsion system is further enhanced, and the ship propulsion system is energy-saving and environment-friendly.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a block diagram illustrating the use of an electric propulsion device of a marine electric propulsion system according to an embodiment of the present application;
FIG. 2 is a schematic cross-sectional view of the electric propulsion device of FIG. 1 at A-A;
fig. 3 is a schematic view of an operation state of an electric propulsion device of a ship electric propulsion system according to an embodiment of the present application;
fig. 4 is a second schematic view of an electric propulsion device of a ship electric propulsion system according to an embodiment of the present application;
fig. 5 is a block diagram of a marine electric propulsion system according to an embodiment of the present application.
In the figure: 10. an electric propulsion device; 11. a base; 12. a stator; 121. winding a coil; 13. a rotor; 131. an intermediate shaft; 132. a permanent magnet; 20. a bearing seat; 30. an electric storage device; 40. a main generator set; 50. a rectifying device; 100. propeller shafting.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
According to a first aspect of the present application, as shown in fig. 1 and 2, there is first provided a marine electric propulsion system comprising at least two electric propulsion devices 10, each electric propulsion device 10 comprising a base 11, a stator 12 and a rotor 13. Wherein, base 11 links firmly with the hull, and stator 12 installs on base 11, and stator 12 includes circumference evenly distributed's wound coil 121, and rotor 13 includes jackshaft 131 and a plurality of permanent magnets 132 that evenly arrange around the jackshaft 131 circumference, and jackshaft 131 links firmly with permanent magnets 132 and rotates in step, and rotor 13 installs in stator 12. The rotation axes of the intermediate shafts 131 of the electric propulsion devices 10 are coincident and are rigidly connected end to end in sequence, so that a plurality of intermediate shafts 131 are formed in series. The middle shaft 131 of the electric propulsion device 10 located at the side is connected with the propeller shaft system 100, the middle shaft 131 rotates to drive the propeller shaft system 100 to rotate, and the rotation of the propeller shaft system 100 can also drive the middle shaft 131 to rotate. When the winding coil 121 of any one of the electric propulsion devices 10 is energized, a magnetic field is generated to generate repulsive force and attractive force to the permanent magnet 132, so as to drive the intermediate shaft 131 to rotate. When the winding coil 121 of each electric propulsion device 10 is not electrified, if the intermediate shaft 131 rotates, the permanent magnet 132 is driven to rotate, so that the winding coil 121 cuts the magnetic induction line to generate current.
In the ship electric propulsion system of the above embodiment, at least two electric propulsion devices 10 are adopted, and the rotation axes of the intermediate shafts 131 of all the electric propulsion devices 10 are coincident and are rigidly connected in turn end to end, so that a series electric propulsion mode is formed, and the power capacity of the ship is dispersed, so that as long as one electric propulsion device 10 can work normally, the ship can maintain the sailing capacity, and the normal running of the ship is prevented from being influenced by the failure or sudden stop of the single electric propulsion device 10.
Meanwhile, the rotor 13 and the stator 12 of the electric propulsion device 10 are configured, on one hand, the permanent magnets 132 can generate repulsive force and attractive force by generating a magnetic field when the winding coil 121 is electrified, so as to drive the intermediate shaft 131 to rotate, and further drive the propeller shafting 100 to rotate, so as to drive the ship to sail. On the other hand, when the ship is decelerating, the winding coil 121 does not need to be electrified, the rest inertial rotation speed of the propeller shafting 100 drives the intermediate shaft 131 to rotate, and then drives the permanent magnet 132 to rotate, so that the winding coil 121 cuts the magnetic induction line to generate current for ship illumination or storage, thereby converting the ship kinetic energy into electric energy, and recovering the power when the ship is decelerating through the electric propulsion device 10.
In addition, when the ship is in different acceleration states or different sailing speeds are required, one or more of the plurality of electric propulsion devices 10 can be started, and the electric propulsion devices can be started without being electrified to serve as generators for generating electricity, so that a sailing state in which sailing and electricity generation are compatible is realized, and energy sources are effectively utilized.
Further, the electric propulsion device 10 can rotate in different directions, and current and voltage of the winding coil 121 of the stator 12 can be adjusted to realize different rotation speeds and torques, so that rapid braking of the ship is realized.
In summary, in the ship electric propulsion system of the present embodiment, the power capacity of the ship is dispersed by using the electric propulsion devices 10 capable of mutually converting the electric energy and the mechanical energy, so that the normal running of the ship is prevented from being affected due to the failure of the single electric propulsion device 10, the risk of losing power during the ship sailing is effectively reduced, the redundancy and the reliability of the ship electric propulsion system are improved, and the guarantee is provided for the safe sailing of the ship. At the same time, a plurality of even all electric propulsion devices 10 can be started during acceleration or high-load sailing to provide larger power performance, and a small number of electric propulsion devices 10 can be started during low-speed or low-load sailing to provide power performance matched with the requirement, so that the maneuvering flexibility of the ship is improved. Further, the electric propulsion device 10 can recover the power of the ship during the speed reduction of the ship, and convert the kinetic energy of the ship into electric energy, so that the risk resistance of the ship propulsion system is further enhanced, and the energy conservation and the environmental protection are realized.
The electric propulsion device 10 may be three, four, five, or the like, depending on the type of ship, the size of space, the size of load, the speed of sailing, or the like.
As shown in fig. 3, the winding coil 121 of the electric propulsion device 10 is turned on with a current, and a magnetic field is formed due to a magnetic effect of the current, and the magnetic field acts on the magnetic field of the permanent magnet 132 to push the rotor 13 to rotate, so that the rotor 13 rotates clockwise to drive the marine propeller shafting 100 to rotate. As shown in fig. 4, after the permanent magnet 132 rotates over the nearest winding coil 121, the position change of the rotor 13 can be detected by means of the position sensor, and the controller is used to control the circuit of the stator 12 for winding the winding coil 121, so as to deflect the current direction of the winding coil 121, and the generated magnetic field is reversed, and the reversed magnetic field continuously acts with the magnetic field of the permanent magnet 132 to push the rotor 13 to rotate clockwise, so that the magnetic field generated by the winding coil 121 and the magnetic field of the permanent magnet 132 repeatedly drive the ship propeller shafting 100 to rotate due to the repulsive force and attractive force generated by the magnetic force, and finally push the ship to run.
In one embodiment, all of the electric propulsion devices 10 are identical in construction; in the axial direction of the intermediate shaft 131, the winding coils 121 of the stators 12 of all the electric propulsion devices 10 are completely overlapped, and after the intermediate shafts 131 of the rotors 13 of all the electric propulsion devices 10 are sequentially connected, the permanent magnets 132 on all the intermediate shafts 131 are completely overlapped in the axial direction of the intermediate shaft 131, so that when all the electric propulsion devices 10 drive the intermediate shafts 131 to rotate, repulsive force and attractive force can be formed on the respective permanent magnets 132 simultaneously, thereby realizing faster acceleration of the intermediate shaft 131 and larger driving force of the intermediate shaft 131.
In one embodiment, as shown in fig. 1, the marine electric propulsion system further comprises a bearing housing 20; a bearing seat 20 is respectively arranged on the ship bodies at two sides of each electric propulsion device 10; the two ends of the intermediate shaft 131 of each electric propulsion device 10 extend out of the stator 12 by a predetermined length, and the two ends of the intermediate shaft 131 of each electric propulsion device 10 are respectively matched with one bearing seat 20; the two bearing blocks 20 support one intermediate shaft 131 so that the axis of the intermediate shaft 131 coincides with the axis of the stator 12, and also so that a plurality of intermediate shafts 131 ensure good coaxiality. Meanwhile, the bearing housing 20 can prevent the intermediate shaft 131 from generating a large deflection change due to the dead weight of the ship or the load applied to the ship during sailing.
In one embodiment, as shown in fig. 1, adjacent intermediate shafts 131 are connected by a flange structure to facilitate disassembly and subsequent maintenance.
In one embodiment, as shown in fig. 5, the ship electric propulsion system further comprises an electric storage device 30 electrically connected to the electric propulsion device 10 for storing electric current generated by cutting the magnetic induction lines of the permanent magnets 132 by the winding coil 121, so as to facilitate the power consumption of the lighting system, the auxiliary motor, etc., and also can be used as a supplementary energy source of the electric propulsion device 10.
In one embodiment, as shown in fig. 5, the ship electric propulsion system further comprises a main generator set 40, a rectifying device 50, and the like, wherein the main generator set 40 converts the generated alternating current into direct current through the rectifying device 50 so as to supply the electric propulsion device 10 and other electric facilities of the ship.
In one embodiment, as shown in fig. 2, the number of permanent magnets 132 is the same as and even as the number of the wound coils 121, so that the electric propulsion device 10 can form the same driving force under the same current and voltage, to improve the conversion efficiency of electric energy into mechanical energy as much as possible, and to avoid the waste of energy caused by the excessively low speed of the rotor 13 of the electric propulsion device 10 as much as possible.
In one embodiment, the wound coils 121 of all of the electric propulsion devices 10 are de-energized during deceleration of the vessel to effect recovery of power thereof for conversion to electrical energy during deceleration of the vessel. During the acceleration or uniform speed navigation of the ship, the winding coils 121 of at least one electric propulsion device 10 are electrified, and the winding coils 121 of different numbers of electric propulsion devices 10 are electrified to adapt to different navigation speeds and navigation loads.
According to a second aspect of the present application, there is also provided a ship electric propulsion method using the ship electric propulsion system in the above-described aspect, the ship electric propulsion method including:
s1, acquiring a navigation speed state of a ship;
s12, if the sailing speed state of the ship is a deceleration state, the power supply of the winding coils 121 of the stators 12 of all the electric propulsion devices 10 is cut off, so that the propeller shafting 100 drives a plurality of intermediate shafts 131 connected in series to rotate, and further drives the rotor 13 to rotate, and the winding coils 121 of all the electric propulsion devices 10 cut the magnetic induction lines of the permanent magnets 132 to generate current for the ship to store or use;
and S13, if the sailing speed state of the ship is in an accelerating or uniform speed state, electrifying the winding coils 121 of the stator 12 of at least one electric propulsion device 10, wherein the electrifying of the winding coils 121 generates a magnetic field to generate repulsive force and attractive force on the permanent magnets 132 so as to drive all the intermediate shafts 131 connected in series to rotate, and further drive the propeller shafting 100 to rotate.
In one embodiment, when the sailing speed state of the ship is in an accelerating or uniform speed state, a speed threshold is set, wherein the speed threshold is different according to specific numerical values of different ships and is mainly used for dividing the boundary value of the low-speed low-load operation and the high-load sailing of the ship, so that the ship electric propulsion method further comprises the following steps:
s14, if the sailing speed state of the ship is in an accelerating or uniform speed state, and the sailing speed of the ship is lower than a speed threshold value, electrifying the winding coil 121 of the stator 12 of at least one electric propulsion device 10, cutting off the electrifying the winding coil 121 of the stator 12 of at least one electric propulsion device 10, wherein the electrified electric propulsion device 10 is used for driving the serially connected intermediate shaft 131 to rotate so as to drive the propeller shafting 100 to rotate, and the electrified electric propulsion device 10 cuts the magnetic induction line of the permanent magnet 132 by the winding coil 121 so as to generate current for the ship to store or use;
and S15, if the sailing speed state of the ship is in an accelerating or uniform speed state and the sailing speed of the ship is greater than or equal to a speed threshold value, electrifying the winding coils 121 of the stators 12 of all the electric propulsion devices 10, and electrifying the winding coils 121 to generate a magnetic field to generate repulsive force and attractive force on the permanent magnets 132 so as to drive all the intermediate shafts 131 connected in series to rotate and further drive the propeller shafting 100 to rotate.
The foregoing is merely a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and variations may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims (8)
1. A marine electric propulsion system, characterized by comprising at least two electric propulsion devices (10); each electric propulsion device (10) comprises a base (11), a stator (12) and a rotor (13):
the base (11) is fixedly connected with the ship body; the stator (12) is arranged on the base (11), and the stator (12) comprises winding coils (121) which are uniformly distributed on the circumference; the rotor (13) comprises an intermediate shaft (131) and a plurality of permanent magnets (132) uniformly arranged around the circumference of the intermediate shaft (131), the intermediate shaft (131) is fixedly connected with the permanent magnets (132) and synchronously rotates, and the rotor (13) is arranged in the stator (12);
the rotation axes of the intermediate shafts (131) of the electric propulsion devices (10) are overlapped and are rigidly connected end to end in sequence to form a plurality of intermediate shafts (131) which are connected in series; the middle shaft (131) of the electric propulsion device (10) positioned at the side is connected with the propeller shaft system (100), the middle shaft (131) rotates to drive the propeller shaft system (100) to rotate, and the rotation of the propeller shaft system (100) can also drive the middle shaft (131) to rotate;
generating a magnetic field to generate repulsive force and attractive force to the permanent magnet (132) when the winding coil (121) of any one of the electric propulsion devices (10) is electrified so as to drive the intermediate shaft (131) to rotate;
the structure of all the electric propulsion devices (10) is identical; -said wound coils (121) of said stator (12) of all said electric propulsion devices (10) are completely coincident, along the axial direction of said intermediate shaft (131); after the intermediate shafts (131) of the rotors (13) of all the electric propulsion devices (10) are connected in sequence, the permanent magnets (132) on all the intermediate shafts (131) are completely overlapped along the axial direction of the intermediate shafts (131);
generating a simultaneous repulsive force and attractive force to the respective permanent magnets (132) when the wound coils (121) of the two electric propulsion devices (10) are energized;
when the winding coil (121) of each electric propulsion device (10) is not electrified, if the intermediate shaft (131) rotates, the permanent magnet (132) is driven to rotate, so that the winding coil (121) cuts a magnetic induction line to generate current.
2. The marine electric propulsion system of claim 1, further comprising a bearing housing (20);
the ship hulls on two sides of each electric propulsion device (10) are respectively provided with a bearing seat (20);
both ends of the intermediate shaft (131) of each electric propulsion device (10) extend out of the stator (12) by a preset length, and both ends of the intermediate shaft (131) of each electric propulsion device (10) are respectively matched with one bearing seat (20);
two bearing blocks (20) support one intermediate shaft (131) such that the axis of the intermediate shaft (131) coincides with the axis of the stator (12).
3. Marine electric propulsion system according to claim 2, characterized in that adjacent intermediate shafts (131) are connected by a flange structure.
4. Marine electric propulsion system according to claim 1, characterized in that it further comprises an electrical storage device (30) electrically connected to the electric propulsion device (10) for storing the current generated by the winding coil (121) cutting the induction line of the permanent magnet (132).
5. Marine electric propulsion system according to any of claims 1-4, characterized in that the number of permanent magnets (132) is the same as the number of wound coils (121) and even.
6. Marine vessel electric propulsion system according to any of claims 1-4, characterized in that the winding coils (121) of all the electric propulsion devices (10) are not energized when the marine vessel is decelerating;
the winding coil (121) of at least one of the electric propulsion devices (10) is energized during acceleration or constant speed navigation of the ship.
7. A ship electric propulsion method, characterized in that it uses the ship electric propulsion system according to any one of claims 1 to 6, the ship electric propulsion method comprising:
acquiring the navigation speed state of the ship;
if the sailing speed state of the ship is a deceleration state, the power supply of the winding coils (121) of the stators (12) of all the electric propulsion devices (10) is cut off, so that the propeller shafting (100) drives a plurality of intermediate shafts (131) connected in series to rotate, and then the rotor (13) is driven to rotate, and the winding coils (121) of all the electric propulsion devices (10) cut the magnetic induction lines of the permanent magnets (132) to generate current for the ship to store or use;
if the sailing speed state of the ship is in an accelerating or uniform speed state, the winding coil (121) of the stator (12) of at least one electric propulsion device (10) is electrified, and the winding coil (121) is electrified to generate a magnetic field to generate repulsive force and attractive force for the permanent magnets (132) so as to drive all the intermediate shafts (131) connected in series to rotate, and further drive the propeller shafting (100) to rotate.
8. The ship electric propulsion method according to claim 7, wherein a speed threshold is set when the sailing speed state of the ship is an acceleration or constant speed state, the ship electric propulsion method further comprising:
if the sailing speed state of the ship is in an accelerating or uniform speed state and the sailing speed of the ship is lower than a speed threshold value, electrifying a winding coil (121) of a stator (12) of at least one electric propulsion device (10), cutting off electrifying the winding coil (121) of the stator (12) of at least one electric propulsion device (10), wherein the electrified electric propulsion device (10) is used for driving a serially connected intermediate shaft (131) to rotate so as to drive a propeller shafting (100) to rotate, and the electrified cut-off electric propulsion device (10) cuts a magnetic induction line of a permanent magnet (132) by the winding coil (121) so as to generate electric current for storing or using the ship;
if the sailing speed state of the ship is in an accelerating or uniform speed state and the sailing speed of the ship is greater than or equal to a speed threshold value, electrifying winding coils (121) of stators (12) of all electric propulsion devices (10), and electrifying the winding coils (121) to generate a magnetic field to generate repulsive force and attractive force to permanent magnets (132) so as to drive all intermediate shafts (131) connected in series to rotate and further drive a propeller shafting (100) to rotate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210926228.8A CN115123510B (en) | 2022-08-03 | 2022-08-03 | Ship electric propulsion system and electric propulsion method |
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| DE10158757A1 (en) * | 2001-11-29 | 2003-06-18 | Siemens Ag | marine propulsion |
| CN102324820A (en) * | 2011-08-17 | 2012-01-18 | 浙江大学 | Magnetic field modulated multi-power port permanent magnetic motor |
| CN104467333B (en) * | 2014-12-01 | 2017-04-12 | 哈尔滨工业大学 | Rotor excitation multi-phase reluctance motor and control method thereof |
| KR20170116719A (en) * | 2016-04-12 | 2017-10-20 | 주식회사 엘지엠 | Driving system with hybrid |
| CN107733106B (en) * | 2017-10-27 | 2020-04-07 | 大连海事大学 | Permanent-magnet fault-tolerant rim propulsion motor for integrated motor propeller |
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